/* Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 * 
 *      http://www.apache.org/licenses/LICENSE-2.0
 * 
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package org.activiti.engine.impl.delegate;

import java.io.Serializable;

import org.activiti.engine.api.internal.Internal;
import org.activiti.engine.delegate.DelegateExecution;

/**
 * 活动行为
 */
@Internal
public interface ActivityBehavior extends Serializable {

  /**
   * StartEvent事件如果没有行为，则走 NoneStartEventActivityBehavior，但因
   * NoneStartEventActivityBehavior 没有任务实现 execute 方法，导致通过IDEA的
   * 实现图标无法直接找到 NoneStartEventActivityBehavior，若要找到它，可以通过
   * 快捷键 Ctrl+H，先找到 TriggerableActivityBehavior -> 再找到 FlowNodeActivityBehavior ->
   * 最后就找到了 NoneStartEventActivityBehavior。
   *
   * 常见的Behavior
   * StartEvent --> NoneStartEventActivityBehavior
   * UserTask   --> UserTaskActivityBehavior
   * @param execution
   */
  void execute(DelegateExecution execution);
}
